Health experts say that dietary fat promotes weight gain because it is a very dense source of calories and you store those calories as body fat easier than calories from other sources.

Food manufacturers have been quick to react and have provided a huge range of low or no fat foods but despite this the American people are getting larger, the simple reason for this may surprise you! What people fail to understand is that it isn't just fat in their food that is making them put on weight, it's the quantity of food they consume and the calorific content of it.

Try the medifast weight loss diet which contains all food groups in right proportion.